Abstract

Multiphoton spectroscopy has proved to be a valuable technique at visible and uv wavelengths, allowing access to high-lying states and the excitation of transitions not allowed for one photon excitation. Using vuv radiation for multiphoton excitation allows probing even higher states, but high powers are required to obtain reasonable signals. Two-photon excitation with vuv radiation has been performed using tunable excimer laser radiation¹ and by Raman-shifting a frequency-doubled dye laser.²

© 1991 Optical Society of America